Thunderbird will automatically select the server host name, port number, SSL and Authentication settings for you. Some of these settings will need to be adjusted

Click [Manual Config]

Modify the incoming settings to:

Incoming protocol: Select POP3 or IMAP from the drop down. POP is more common, however you can easily chose IMAP if you preferIncoming server hostname: pop.example.com if using POP3 or imap.example.com if using IMAP. Where example.com is your domain nameIncoming port: 995 is using POP3, 993 if using IMAPIncoming SSL: SSL/TLSIncoming authentication: Normal password